Rest



Oct. 8, 1935.

L. E. BROWN 2,016,482

REST

Filed July 10, 1954 5 sheets-sheet 1 I A L-/I K nvenlor /2 L,E. B7^0Wn @Zwan/ih Attorney Oct. 8

l.. E. BROWN REST . 3 Sheets-sheet 2 Filed July 10 1954 Inventor L E, BMW

By s mln/gaarne!! REST Filed July l0, 1934 3 'Sheets-Sheet 3 Inventor L rown llame y Patented Oct. 8, 1935 UNITED STATES l'Pmi-:Nr OFFICE REST Luther E. Brown, Greggton, Tex.

rest

a steady rest 'for lathes which may be Application July 10, 1934, Serial No. 734,549

.3 Claims. (Cl. 82-39) This invention relates broadly to lathes and more particularly to a rest for use in conjunction be used on what is known or on what is known follow rest, and aims to provide readily and easily associated therewith, and wherein improved adjustment of the work eng means is provided for the simultaneous aging fingers.

Other objects and advantages of the invention will be apparent from a study of the following description taken in connection with the accompanying drawings wherein:

Figure l is an elevational view of the rest.

Figure 2 is a top plan View thereof.

Figure 3 is a sectional view taken substantially on the line 3--3 of Figure 2 Figure 4 is a diagrammatic view-of the sprocket arrangement, and

Figure-5 isan :enlarged fragmentary detail section showing the means for securing one of the als it will be seen that fingers against rotation.

drawings by reference numerthe rest comprises a casting formed to provide a base I adapted to be clamped to the bed I I of the lathes through the medium of a clamp-ing block I2 and securing bolt I3 that extends through a vided in the base gagement with the block I Figure 3. When used as a suitable opening pro- I0 and has screw threaded en- 2 as clearly shown in follow rest the devicewould be clamped to the carriage.

Mounted on the block I 0 is a circular casing transversely divided to provide a fixed casing section I4 that is integral a swinging case section I5. xed case section I4 as at casing closed the fixed section I4 is provided with D a pivoted bolt I1 that is apertured ear provided on with the base ID and that is hinged to the I6. For securing the accommodated in an the casing section I5 and is equipped with a nut I8 all of which is clearly shown in Figure 3.

The casing sections I4,

I5 at their meeting edges are provided with semi-circular recesses I9 to accommodate the work when the casing is closed, and each casing section is hollow as at 20.

The inner Walls of the formed integral therewith g there are two guides of the casing section 2I provided in the hollow casing sections have uides 2 I, and as shown 2| provided in the hollow I4, and but a single guide of the casing section I5.

Operating in each of the guides 2l is a clamping finger, and each clamping finger includes an adjusting tube or sleeve 22 that is externally -vided on the external wall of the casing shown in Figure 3. A rod `24 has a sliding fit within the slee-ve 22 and on its inner end is provided with a head 24a, to engage the work. Suitably asso- 5 ciated with the inner end of the rod 24 is an adjusting screw 25 that is screwed into the bore of the sleeve 22 at the outer end thereof and is engageable with the rod 24 to project the latter or retract the same as found desirable relative to the sleeve 22.

AFor each clamping finger there is provided a sprocket 26 having a'hub portion screw threadedly engaged with the guide sleeve 22 and coniined between the free end of the guide 2I and 15 the outer lwall of the casing. It will thus be seen that by rotating the sprocket in the proper direction the guide sleeve 22 with its rod 24 may be shifted radially with respect to the axial center of the casing .and into and out of clamping'e'ngagement with the work.

lFor :simultaneously actuating the adjusting ngers there is provided an operating stem 21 that is journalled in an apertured boss suitably provided on the outer wall of the casing section I5 and confined in position through the medium of a liixed collar 28 and a nut 29. Secured to the inner end of the stem 21 to rotate therewith is a sprocket 30. Trained over the sprockets 26 and 30 is an endless sprocket chain 3I, and said 3o chain 3`I is also trained over suitable guide pulleys 32 mounted on shafts 33 arranged within the hollows 20 of the casing sections. At its outer end the operating stem 21 is provided with a socket 34 to accommodate a wrench or other suit- 35 able tool for rotating the stem 21 and thus operate the chain and sprocket means for projecting or retracting the clamping fingers as found desirable.

To retain the sleeves 22 of the guide lingers 4o against rotation, each guide 2l is provided with a lateral formation 35 forming a housing for a sliding key 36 operating in a way 31 provided in the sleeve 22. For projecting and retracting the key 36 there is provided a screw 38 that is suit- 45 ably engaged with the key 36 and is screwed into the outer end of the formation 35 as shown in Figure 5.

It will be apparent that in actual practice the rods 24 of the gripping fingers may be adjusted 50 relative to their respective sleeves 22 as found desirable and necessary in view of the size of the work, or to compensate for wear. For project. ing the clamping fingers into engagement with the work the stem 21 is rotated in one direction, 55

and to retract the lingers the stem 21 is rotated in a reverse direction, the movement of the stem 2 being transmitted to the sleeves `22 of the clamping fingers through the medium of the chain and sprocket connection between said stem and the clamping fingers,

It Will be apparent from the above that I have provided a rest that is characterized by economy of construction and elciency of operation and that the same may be used on a regular engine lathe or ana-lagons machine where a rest is needed. I

Having thus described my invention, what I claim as new is: J

l. A rest for lathes and analogous machinery comprising a substantially circular casing consisting of two hingedly connected semi-circular sections, clamping ngers movable radially through the sections into and out of clamping position, and internal means operating within the sections and connected With the clamping fingers for projecting and retracting the latter, said means including sprockets screw threadedly engaged with the lingers for causing the lingers to move axially relative to the sprockets upon rotation of the latter, a rotatably mounted control stem provided with a sprocket, and an endless chain engaging the sprockets for transmitting movement of the stern to the sprockets associated with the guide nger for projecting and retracting the latter.

2. A rest of the character described comprising a substantially circular casing divided transversely into a pair of substantially semi-circular sections hingedly connected together, each section being hollow and provided with one or more radial guides, and a clamping nger operating through each guide, each clamping nger including a tubular sleeve, a rod having a sliding lit in the sleeve and provided at one end with a clamping head and at a relatively opposite end with an adjusting screw having threaded engagement with the sleeve for axially adjusting the rod relative to the sleeve, and means for simultaneously projecting and retracting the clamping ngers including a sprocket screw threadedly engaged with the sleeve of a nger and conned between one end of the guide and a wall of a casing section against longitudinal movement relative to the sleeve of the finger, a stem journalled in the outer wall of one of the casing sections and provided at its outer end with means for the application thereto of an operating tool, and at its inner end with a sprocket, and an endless chain engaging the sprockets.

3. A rest of the character described comprising a substantially circular casing divided transversely into a pair of substantially semi-circular sections hingedly connected together, each section being hollow and provided with one or more radial guides, and a clamping nger operating through each guide, each clamping nger including a tubularsleeve, a rod having a sliding t in the sleeve and provided at one end with a clamping head and at a relatively opposite end with an adjusting screw having threaded engagement with the sleeve for axially adjusting the rod relagaging the sprockets, and pairs of rollers journalled in the hollow of the casing sections and over which are trained the runs of the endless chain.

LUTHER E. BROWN. 

